Base-Catalyzed Oxidation of Carboxymethyl-cellulose Polymer by Permanganate

Novel Carboxymethyl Cellulose Ionotropic Gels

“…Therefore it is worth mentioning that several trials were carefully conducted at different [CMC]/[MnO The importance of the recent and the preceding contibutions (Ref. 6) is to shed more light on the mechanism and the nature of the oxidation of carboxymethyl cellulose polymer sol carrying hydrophilic secondary OH and carboxylate groups and converted on oxidation into mono and/or diketo polymer sol via the referenced coordination polymer intermediate sol of manganate(VI) and hypomanganate(V) rare states. Moreover, as a side product of the oxidation, MnO 2 sol is formed.…”

“…T as the decomposition reaction proceeds via intermediates A 1 , A 2 or to the decomposition of fac. and mer isomers as recently described elsewhere (6). The respective first-order rate constant values for the decomposition of these two intermediate Maximum error = 3%.…”

“…The oxidation of carboxymethyl, cellulose (CMC) (6), like that of poly(vinyl alcohol) as a synthetic polymer (7) and sodium alginate (8) as a natural polymer, all containing secondary alcoholic OH groups, was found to proceed via manganate(VI) intermediate complex.…”

Review of Alternative Enhanced Chemical Cleaning Options for SRS Waste Tanks

“…However, the oxidations with KMnO 4 can be effective over a wide range of pH values and even under strongly basic conditions. [28][29] The oxidative destruction of oxalic acid appears to be slower and less efficient as the pH of the solution increases. At low pH oxalic acid is readily oxidized by KMnO 4 .…”

Spectrophotometric evidence for the formation of short-lived hypomanganate(V) and manganate(VI) transient species during the oxidation of K-carrageenan by alkaline permanganate

“…1 is autocatalyzed by the presence of Mn IV . 1,5 The formation of Mn VI and/or Mn V as short-lived intermediates have been postulated by many investigators during the oxidation of macromolecules [6][7][8][17][18][19][20][21][22] or organic substrates 14,16 by permanganate ion in alkaline solutions. The formation of long-lived hypomanganate(V) is conceivable only with sterically rigid olefines, 4,23 and sulfite ion.…”